Statistical investigation concerning child-hood tuberculosis.

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I examined Tuberclin-Reaction for the 209 pupils of a elementary school standing within the limits of the former city in Tokyo, and perceived breasts by the X-rays on the pupils showed positive reaction. In sum, the result is a s below:<BR>1. In Tuberblin-reaction, the p o s itive reaction rate showed 33.3% in boys, 37.8%in girls, 35.9% in the sum total boys and girls. The positive reaction rate in girls was pretty higher than in boys.<BR>2. In observation of the distribution of positive type in the positive pupils in Tuberclin-Reaction, 42.7% of that showed weak positive reaction, 46.7% showed middlegrade, and 10.7% showed intense. From sex point of view, in boys 56.7% of that showed weak positive reaction, 33.3% showed middle-grade, and 10.0% showed intense; in girls, 33.3% of that showed weak positive reaction, 55.6% showed middle-grade, and 11.1% showed intense.<BR>3. As the result of perceiving breasts by the X-rays on the positive pupils in Tuberclin-Reaction, I recognized tuberculous lesion by 62.7% of that, and did not by 37.3%. From sex point of view, in boys, I recognized tuberculous lesion by 70.0% of that, and did not by 30.0%; in girls, I recognized tuberculous lesion by 57.8% of that, and din not by 42.2%.<BR>4. In the c lassification of tuberculous lesion appeared in the positive pupils in
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